import { formatDistanceToNow } from "date-fns";
import invariant from "invariant";
import { observer } from "mobx-react";
import { GlobeIcon, PadlockIcon } from "outline-icons";
import * as React from "react";
import { useTranslation, Trans } from "react-i18next";
import styled from "styled-components";
import Document from "~/models/Document";
import Share from "~/models/Share";
import Button from "~/components/Button";
import CopyToClipboard from "~/components/CopyToClipboard";
import Flex from "~/components/Flex";
import Input from "~/components/Input";
import Notice from "~/components/Notice";
import Switch from "~/components/Switch";
import Text from "~/components/Text";
import useCurrentTeam from "~/hooks/useCurrentTeam";
import useKeyDown from "~/hooks/useKeyDown";
import usePolicy from "~/hooks/usePolicy";
import useStores from "~/hooks/useStores";
import useToasts from "~/hooks/useToasts";
import useUserLocale from "~/hooks/useUserLocale";
import { dateLocale } from "~/utils/i18n";

type Props = {
  document: Document;
  share: Share | null | undefined;
  sharedParent: Share | null | undefined;
  onRequestClose: () => void;
  visible: boolean;
};

function SharePopover({
  document,
  share,
  sharedParent,
  onRequestClose,
  visible,
}: Props) {
  const team = useCurrentTeam();
  const { t } = useTranslation();
  const { shares } = useStores();
  const { showToast } = useToasts();
  const [isCopied, setIsCopied] = React.useState(false);
  const timeout = React.useRef<ReturnType<typeof setTimeout>>();
  const buttonRef = React.useRef<HTMLButtonElement>(null);
  const can = usePolicy(share ? share.id : "");
  const documentAbilities = usePolicy(document);
  const canPublish =
    can.update &&
    !document.isTemplate &&
    team.sharing &&
    documentAbilities.share;
  const isPubliclyShared =
    team.sharing &&
    ((share && share.published) ||
      (sharedParent && sharedParent.published && !document.isDraft));

  useKeyDown("Escape", onRequestClose);

  React.useEffect(() => {
    if (visible && team.sharing) {
      document.share();
      buttonRef.current?.focus();
    }

    return () => (timeout.current ? clearTimeout(timeout.current) : undefined);
  }, [document, visible, team.sharing]);

  const handlePublishedChange = React.useCallback(
    async (event) => {
      const share = shares.getByDocumentId(document.id);
      invariant(share, "Share must exist");

      try {
        await share.save({
          published: event.currentTarget.checked,
        });
      } catch (err) {
        showToast(err.message, {
          type: "error",
        });
      }
    },
    [document.id, shares, showToast]
  );

  const handleChildDocumentsChange = React.useCallback(
    async (event) => {
      const share = shares.getByDocumentId(document.id);
      invariant(share, "Share must exist");

      try {
        await share.save({
          includeChildDocuments: event.currentTarget.checked,
        });
      } catch (err) {
        showToast(err.message, {
          type: "error",
        });
      }
    },
    [document.id, shares, showToast]
  );

  const handleCopied = React.useCallback(() => {
    setIsCopied(true);
    timeout.current = setTimeout(() => {
      setIsCopied(false);
      onRequestClose();
      showToast(t("Share link copied"), {
        type: "info",
      });
    }, 250);
  }, [t, onRequestClose, showToast]);

  const userLocale = useUserLocale();
  const locale = userLocale ? dateLocale(userLocale) : undefined;
  const shareUrl = team.sharing
    ? share?.url ?? ""
    : `${team.url}${document.url}`;

  return (
    <>
      <Heading>
        {isPubliclyShared ? (
          <GlobeIcon size={28} color="currentColor" />
        ) : (
          <PadlockIcon size={28} color="currentColor" />
        )}{" "}
        {t("Share this document")}
      </Heading>

      {sharedParent && !document.isDraft && (
        <Notice>
          <Trans
            defaults="This document is shared because the parent <em>{{ documentTitle }}</em> is publicly shared"
            values={{
              documentTitle: sharedParent.documentTitle,
            }}
            components={{
              em: <strong />,
            }}
          />
        </Notice>
      )}

      {canPublish ? (
        <SwitchWrapper>
          <Switch
            id="published"
            label={t("Publish to internet")}
            onChange={handlePublishedChange}
            checked={share ? share.published : false}
            disabled={!share}
          />
          <SwitchLabel>
            <SwitchText>
              {share?.published
                ? t("Anyone with the link can view this document")
                : t("Only team members with permission can view")}
              {share?.lastAccessedAt && (
                <>
                  .{" "}
                  {t("The shared link was last accessed {{ timeAgo }}.", {
                    timeAgo: formatDistanceToNow(
                      Date.parse(share?.lastAccessedAt),
                      {
                        addSuffix: true,
                        locale,
                      }
                    ),
                  })}
                </>
              )}
            </SwitchText>
          </SwitchLabel>
        </SwitchWrapper>
      ) : (
        <Text type="secondary">
          {t("Only team members with permission can view")}
        </Text>
      )}

      {canPublish && share?.published && !document.isDraft && (
        <SwitchWrapper>
          <Switch
            id="includeChildDocuments"
            label={t("Share nested documents")}
            onChange={handleChildDocumentsChange}
            checked={share ? share.includeChildDocuments : false}
            disabled={!share}
          />
          <SwitchLabel>
            <SwitchText>
              {share.includeChildDocuments
                ? t("Nested documents are publicly available")
                : t("Nested documents are not shared")}
            </SwitchText>
          </SwitchLabel>
        </SwitchWrapper>
      )}
      <Flex>
        <InputLink
          type="text"
          label={t("Link")}
          placeholder={`${t("Loading")}…`}
          value={shareUrl}
          labelHidden
          readOnly
        />
        <CopyToClipboard text={shareUrl} onCopy={handleCopied}>
          <Button
            type="submit"
            disabled={isCopied || (!share && team.sharing)}
            ref={buttonRef}
            primary
          >
            {t("Copy link")}
          </Button>
        </CopyToClipboard>
      </Flex>
    </>
  );
}

const Heading = styled.h2`
  display: flex;
  align-items: center;
  margin-top: 12px;
  margin-left: -4px;
`;

const SwitchWrapper = styled.div`
  margin: 20px 0;
`;

const InputLink = styled(Input)`
  flex-grow: 1;
  margin-right: 8px;
`;

const SwitchLabel = styled(Flex)`
  svg {
    flex-shrink: 0;
  }
`;

const SwitchText = styled(Text)`
  margin: 0;
  font-size: 15px;
`;

export default observer(SharePopover);